ENS 44822
From kanterella
Jump to navigation
Jump to search
ENS Event | |
|---|---|
02:56 Feb 2, 2009 | |
| Title | Unusual Event and Reactor Scram Due to Main Transformer Fire |
| Event Description | At 2156 EST, a fire occurred on Main Transformer M1A. The loss of the main transformer resulted in a reactor scram from full power without complications. The transformer deluge system activated. The fire brigade responded and offsite assistance from the fire department was obtained to help extinguish the fire. The fire department has since departed the site. An Unusual Event was declared at 2211 EST based on the transformer fire lasting longer than 15 minutes. The fire was extinguished at 2227 EST. A fire reflash watch was established. There was no damage to any other equipment besides the main transformer.
During the reactor scram transient, the isolation condenser actuated as expected and was subsequently secured. Four electro-magnetic relief valves actuated and reseated normally. The plant is currently in hot standby with reactor pressure at 927 psi and water level at 150 inches with all conditions stable and a normal electrical configuration. The licensee is assessing the criteria for exiting the UE at this time. The licensee has notified State and local government agencies and the NRC Resident Inspector.
The licensee terminated the UE at 2337 EST due to stable plant conditions with all entry criteria for the UE exited and no concern of reflash. The licensee did note that there is an oil sheen on the water around the transformer and indication of a small amount of oil dripping from the transformer. The licensee is taking efforts to contain the spill with spill kits and barriers. The NRC Resident has been notified. Notified R1DO (Schmidt), R1 (Bellamy), NRR EO (Blount), and IRD (McMurtray). Informed DHS (Banner) and FEMA (Barden).
Upon review of the electromagnetic relief valve performance during the reactor scram at 2156 EST on 2/1/09, two electromagnetic relief valves opened - not four (as originally reported). Due to subsequent seat leakage of one electromagnetic relief valve, the valve was cycled and was able to be reseated. At 0444 EST on 2/2/09 downstream relief temperatures confirmed that the valve had reseated. The licensee has notified the NRC Resident Inspector. R1DO (Schmidt) notified. |
| Where | |
|---|---|
| Oyster Creek New Jersey (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+-3.85 h-0.16 days <br />-0.0229 weeks <br />-0.00527 months <br />) | |
| Opened: | Andrew Zuchowski 23:05 Feb 1, 2009 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Feb 2, 2009 |
| 44822 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | A/R |
| Before | Power Operation (100 %) |
| After | Hot Shutdown (0 %) |
Oyster Creek with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | |
WEEKMONTHYEARENS 531532018-01-06T10:24:0006 January 2018 10:24:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Declaration of Unusual Event Due to Abnormal Intake Structure Level ENS 528392017-07-03T14:15:0003 July 2017 14:15:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Scram on Low Condenser Vacuum ENS 523812016-11-20T08:42:00020 November 2016 08:42:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram During Main Turbine Testing ENS 518952016-04-30T22:04:00030 April 2016 22:04:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram During Reactor Startup Due to Increase in Unidentified Leak Rate ENS 510552015-05-07T21:27:0007 May 2015 21:27:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram Due to Turbine Trip ENS 509162015-03-22T18:14:00022 March 2015 18:14:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram Due to Aprm Hi Hi Signal ENS 505242014-10-12T06:51:00012 October 2014 06:51:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram Due to Decreasing Reactor Water Level ENS 502702014-07-11T07:14:00011 July 2014 07:14:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Due to Loss of Main Condenser Vacuum ENS 501452014-05-28T14:37:00028 May 2014 14:37:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to Release of Chlorinated Water ENS 496332013-12-14T08:37:00014 December 2013 08:37:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Due to Rise in Reactor Pressure During Turbine Valve Testing ENS 494142013-10-06T15:30:0006 October 2013 15:30:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Scram Due to Degraded Condenser Vacuum ENS 494042013-10-03T10:43:0003 October 2013 10:43:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram During Startup ENS 484522012-10-29T22:55:00029 October 2012 22:55:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Notice of Unusual Event Declared Due to High Intake Structure Water Level ENS 481252012-07-23T07:29:00023 July 2012 07:29:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Due to Loss of Offsite Power ENS 471882011-08-23T18:05:00023 August 2011 18:05:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of an Unusual Event Due to a Seismic Event ENS 465072010-12-23T19:07:00023 December 2010 19:07:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram During Startup ENS 464432010-12-01T19:55:0001 December 2010 19:55:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Excessive Rcs Leakage from "B" Recirc Pump Seal ENS 451962009-07-12T05:48:00012 July 2009 05:48:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to a Loss of Offsite Power ENS 450212009-04-25T22:05:00025 April 2009 22:05:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Following Loss of Cooling to Main Transformer ENS 448222009-02-02T02:56:0002 February 2009 02:56:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event and Reactor Scram Due to Main Transformer Fire ENS 446882008-11-29T02:01:00029 November 2008 02:01:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Scram Due to Main Transformer Fault ENS 438542007-12-19T16:45:00019 December 2007 16:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Scram Due to Lowering Reactor Level ENS 434952007-07-17T09:22:00017 July 2007 09:22:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Scram on Low Reactor Vessel Water Level (Rvwl) ENS 418992005-08-06T08:03:0006 August 2005 08:03:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to Low Intake Water Level ENS 417412005-06-02T01:09:0002 June 2005 01:09:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram Due to Generator Trip/Turbine Trip Following Offsite Electical Transient ENS 407782004-05-27T04:33:00027 May 2004 04:33:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram While Performing Scheduled Shutdown ENS 404562004-01-17T04:16:00017 January 2004 04:16:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Noue Declared at Oyster Creek Due to Intake Low Water Level ENS 400952003-08-22T06:59:00022 August 2003 06:59:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Turbine Trip Causes Automatic Reactor Scram at Oyster Creek 2018-01-06T10:24:00 | |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_44822&oldid=426023"